Forums

Search with Wattson
Forums
Renewable Heating
Air Source Heat Pum...
Weather compensatio...
 
Notifications
Clear all

Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering you’ll be able to ask questions, join discussions, follow topics you’re interested in, bookmark useful threads and receive notifications when someone replies. Non-registered members also do not have access to our AI features. When choosing your username, please note that it cannot be changed later, so we recommend avoiding brand or product names. Before registering, please take a moment to read the Forum Rules & Terms of Use so we can keep the community helpful, respectful and informative for everyone. Thanks for joining!

Weather compensation- why you should use it

 
Page 2 / 2
Air Source Heat Pumps (ASHPs)
Last Post by cathodeRay 4 months ago
21 Posts
10 Users
10 Reactions
2,461 Views
RSS
JamesPa
 JamesPa
(@jamespa)
Illustrious Member Moderator
Joined: 3 years ago
Posts: 4814
07/01/2026 11:46 am  

Posted by: @jamesh
↑

Interesting thanks. I do wish the vaillant app would let me build my own weather curve. There is a lot of scope for improved user functionality - though I respect they don't want plebs messing with stuff

I agree.  I have been advising another user with a Hitachi heat pump and that does have the ability to program more complex wc curves.

Given how the Vaillant WC curve is presented in the app it wouldn't be that difficult to add the functionality.  It's interesting that the WC curve is a user level function in the app but installer level on the sensocomfort. 

Another feature about the 2-7 temperature range is that it tends to correspond to high humidity.  I for one find that the temperature needs to be half a degree warmer to be comfortable when humidity is high compared to when its low.

Despite all of this my heat pump is still much more comfortable than my boiler system was!

 


4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.


   
ReplyQuote
Toodles
 Toodles
(@toodles)
Famed Member Contributor
Joined: 4 years ago
Posts: 2731
07/01/2026 3:46 pm  

@jamespa We have come a long way since a human lit a fire in the cave entrance to keep warm and fend of foe!😉 Toodles.


Toodles, heats his home with cold draughts and cooks food with magnets.


   
👍
1
ReplyQuote
Majordennisbloodnok
 Majordennisbloodnok
(@majordennisbloodnok)
Famed Member Moderator
Joined: 4 years ago
Posts: 1766
07/01/2026 5:08 pm  

Posted by: @toodles
↑

@jamespa We have come a long way since a human lit a fire in the cave entrance to keep warm and fend of foe!😉 Toodles.

Whilst I'm sitting looking at my woodburning stove, @toodles, I'm not quite so sure....

 


105 m2 bungalow in South East England
Mitsubishi Ecodan 8.5 kW air source heat pump
18 x 360W solar panels
1 x 6 kW GroWatt battery and SPH5000 inverter
1 x Myenergi Zappi
1 x VW ID3
Raised beds for home-grown veg and chickens for eggs

"Semper in excretia; sumus solum profundum variat"


   
ReplyQuote



Toodles
 Toodles
(@toodles)
Famed Member Contributor
Joined: 4 years ago
Posts: 2731
07/01/2026 5:19 pm  

@majordennisbloodnok Well, I suppose there are still a fair number of fossils about (not you, of course!) Toodles.


Toodles, heats his home with cold draughts and cooks food with magnets.


   
😂
1
ReplyQuote
Batpred
 Batpred
(@batpred)
Prominent Member Member
Joined: 1 year ago
Posts: 823
07/01/2026 6:01 pm  

Posted by: @toodles
↑

@jamespa We have come a long way since a human lit a fire in the cave entrance to keep warm and fend of foe!😉 Toodles.

My memories do not go back to that 🙂 But at some point I may get a real fireplace, nothing beats that feeling. 

On the other side of the spectrum, a heat battery is very attractive.  😀 

 


8kW Solis S6-EH1P8K-L-PLUS hybrid inverter; G99: 8kw export; 16kWh Seplos Fogstar battery; Ohme Home Pro EV charger; 100Amp head, HA lab on mini PC


   
ReplyQuote
cathodeRay
 cathodeRay
(@cathoderay)
Famed Member Moderator
Joined: 4 years ago
Posts: 2895
07/01/2026 6:09 pm  

Posted by: @batpred
↑

But at some point I may get a real fireplace, nothing beats that feeling...

...of a red face and cold ankles, as someone, not me, once said. I have a live open fireplace, and wouldn't be without it. 


Midea 14kW (for now...) ASHP heating both building and DHW


   
😂
1
ReplyQuote



Toodles
 Toodles
(@toodles)
Famed Member Contributor
Joined: 4 years ago
Posts: 2731
07/01/2026 6:22 pm  

@batpred Yes, a heat battery (such as the one I use for DHW) is far superior to the system I grew up with in a council house; we had to burn coal even in mid-summer so that the back boiler in the grate would provide us with hot water. We were very pleased when my father was able to afford to fit an immersion heater - a great relief in the hot summer days! Regards, Toodles.


Toodles, heats his home with cold draughts and cooks food with magnets.


   
ReplyQuote
Majordennisbloodnok
 Majordennisbloodnok
(@majordennisbloodnok)
Famed Member Moderator
Joined: 4 years ago
Posts: 1766
07/01/2026 6:31 pm  

I think we're starting to veer off topic again (probably my fault), but before we haul ourselves back to the subject at hand I'll just mention that I'm starting to be reminded of Monty Python's Four Yorkshiremen sketch


105 m2 bungalow in South East England
Mitsubishi Ecodan 8.5 kW air source heat pump
18 x 360W solar panels
1 x 6 kW GroWatt battery and SPH5000 inverter
1 x Myenergi Zappi
1 x VW ID3
Raised beds for home-grown veg and chickens for eggs

"Semper in excretia; sumus solum profundum variat"


   
ReplyQuote
cathodeRay
 cathodeRay
(@cathoderay)
Famed Member Moderator
Joined: 4 years ago
Posts: 2895
07/01/2026 8:18 pm  

@majordennisbloodnok — The Two Ronnies Mastermind sketch was in the youtube sidebar, stunningly clever comic writing, but it might also serve as the model for all those answers dodgy installers give when asked questions.


Midea 14kW (for now...) ASHP heating both building and DHW


   
💥
1
ReplyQuote



Page 2 / 2
Forum Jump:
  Previous Topic
Next Topic  
Related Topics
Topic Tags:  Weather compensation (12) , ashp (84) , savings (2) ,



Share:

Join Us!

Worth Watching

Latest Posts

Click to access the login or register cheese
x Powerful Protection for WordPress, from Shield Security PRO
This Site Is Protected By
Shield Security PRO →